DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): When our muscle cells respire an aerobically cramps occur. Reason (R): The accumulation of lactic acid causes cramps

• A. Both A and R is true and R is the correct explanation of A.
• B. Both A and R is true but R is not the correct explanation of A.
• C. A is true but R is false.
• D. A is false but R is true.